Ive just started a new job this week and my boss wants me to wear jewish overdress?

i am white english CofE and she's an orthodox jew. i wear a trouser suit for work (in an office) but today she said she's ordered me a jewish overdress because if the religious jews come in. she said just wear like tshirt and jeans and wear this dress. i'd feel uncomfortable though. i respect her religion but i aint a jew and i think she should understand that aswell, is my arguement fair ? it'll be a wig next ! lol